U.S. patent application number 14/029649 was filed with the patent office on 2014-01-16 for ink compostion and image forming method.
This patent application is currently assigned to FUJIFILM CORPORATION. The applicant listed for this patent is FUJIFILM CORPORATION. Invention is credited to Koji HIRONAKA, Ippei NAKAMURA, Norihide SHIMOHARA.
Application Number | 20140015906 14/029649 |
Document ID | / |
Family ID | 46930646 |
Filed Date | 2014-01-16 |
United States Patent
Application |
20140015906 |
Kind Code |
A1 |
NAKAMURA; Ippei ; et
al. |
January 16, 2014 |
INK COMPOSTION AND IMAGE FORMING METHOD
Abstract
An ink composition includes (component A) a compound having a
group represented by the following Formula (1), (component B1) a
monofunctional polymerizable compound, and (component C) a coloring
material: ##STR00001## wherein, in Formula (1), R.sup.a and R.sup.b
each independently represent a hydrogen atom or an alkyl group
having 1 to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to
each other to form a 4- to 6-membered alicyclic structure; R.sup.a
and R.sup.b do not represent a hydrogen atom at the same time; and
* represents a bonding site.
Inventors: |
NAKAMURA; Ippei; (Kanagawa,
JP) ; SHIMOHARA; Norihide; (Kanagawa, JP) ;
HIRONAKA; Koji; (Kanagawa, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
FUJIFILM CORPORATION |
Tokyo |
|
JP |
|
|
Assignee: |
FUJIFILM CORPORATION
Tokyo
JP
|
Family ID: |
46930646 |
Appl. No.: |
14/029649 |
Filed: |
September 17, 2013 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/JP2012/056593 |
Mar 14, 2012 |
|
|
|
14029649 |
|
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Current U.S.
Class: |
347/100 ;
106/31.13; 524/530; 524/533 |
Current CPC
Class: |
B41M 7/0081 20130101;
C09D 11/30 20130101; C09D 11/322 20130101; C09D 11/101
20130101 |
Class at
Publication: |
347/100 ;
106/31.13; 524/533; 524/530 |
International
Class: |
C09D 11/00 20060101
C09D011/00 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 25, 2011 |
JP |
2011-068835 |
Claims
1. An ink composition comprising: (component A) a compound having a
group represented by the following Formula (1); (component B1) a
monofunctional polymerizable compound; and (component C) a coloring
material: ##STR00027## wherein, in Formula (1), R.sup.a and R.sup.b
each independently represent a hydrogen atom or an alkyl group
having 1 to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to
each other to form a 4- to 6-membered alicyclic structure; R.sup.a
and R.sup.b do not represent a hydrogen atom at the same time; and
* represents a bonding site.
2. The ink composition according to claim 1, further comprising
(component B2) a polyfunctional polymerizable compound.
3. The ink composition according to claim 2, wherein a total
content of the (component B1) and the (component B2) in the ink
composition is from 50% by mass to 90% by mass with respect to the
ink composition.
4. The ink composition according to claim 2, wherein a content of
the (component B1) monofunctional polymerizable compound is from
50% by mass to 99.5% by mass with respect to a total content of the
(component B1) monofunctional polymerizable compound and the
(component B2) polyfunctional polymerizable compound.
5. The ink composition according to claim 1, wherein a content of
the (component A) in the ink composition is from 0.1% by mass to
20% by mass with respect to the ink composition.
6. The ink composition according to claim 5, wherein a content of
the (component A) in the ink composition is from 1% by mass to 15%
by mass with respect to the ink composition.
7. The ink composition according to claim 1, wherein the (component
A) is a compound represented by the following Formula (11):
##STR00028## wherein, in Formula (11), R.sup.a and R.sup.b each
independently represent a hydrogen atom or an alkyl group having 1
to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to each other
to form a 4- to 6-membered alicyclic structure; R.sup.a and R.sup.b
do not represent a hydrogen atom at the same time; R.sup.c
represents a hydrogen atom or a methyl group; Z represents a single
bond, --COO--* or --CONR.sup.d--*; R.sup.d represents a hydrogen
atom or an alkyl group having 1 to 4 carbon atoms; * represents a
bonding site with X; and X represents a group selected from the
group consisting of an alkylene group, an arylene group, an
aralkylene group, and an alkenylene group.
8. The ink composition according to claim 7, wherein X in Formula
(11) is an alkylene group having 1 to 12 carbon atoms, an arylene
group having 6 to 14 carbon atoms, or an aralkylene group having 7
to 20 carbon atoms.
9. The ink composition according to claim 1, wherein the (component
A) is a polymer including a repeating unit represented by the
following Formula (1a): ##STR00029## wherein, in Formula (1a),
R.sup.a and R.sup.b each independently represent a hydrogen atom or
an alkyl group having 1 to 4 carbon atoms; R.sup.a and R.sup.b may
be bonded to each other to form a 4- to 6-membered alicyclic
structure; R.sup.a and R.sup.b do not represent a hydrogen atom at
the same time; R.sup.c represents a hydrogen atom or a methyl
group; Z represents a single bond, --COO--* or --CONR.sup.d--*;
R.sup.d represents a hydrogen atom or an alkyl group having 1 to 4
carbon atoms; * represents a bonding site with X; and X represents
a group selected from the group consisting of an alkylene group, an
arylene group, an aralkylene group, and an alkenylene group.
10. The ink composition according to claim 9, wherein X in Formula
(1a) is an alkylene group having 1 to 12 carbon atoms, an arylene
group having 6 to 14 carbon atoms, or an aralkylene group having 7
to 20 carbon atoms.
11. The ink composition according to claim 1, comprising an N-vinyl
compound as the (component B1) monofunctional polymerizable
compound.
12. The ink composition according to claim 11, wherein the N-vinyl
compound is represented by the following Formula (V): ##STR00030##
wherein, in Formula (V), m represents an integer of from 1 to
5.
13. The ink composition according to claim 1, being an ink
composition for inkjet recording.
14. An image forming method comprising: applying the ink
composition according to claim 1 onto a recording medium; and
irradiating the applied ink composition with an active energy
ray.
15. The image forming method according to claim 14, wherein the
applying of the ink composition is performed according to an inkjet
method.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation application of
International Application No. PCT/JP2012/056593, filed Mar. 14,
2012, the disclosure of which is incorporated herein by reference
in its entirety. Further, this application claims priority from
Japanese Patent Application No. 2011-068835, filed Mar. 25, 2011,
the disclosure of which is incorporated herein by reference in its
entirety.
TECHNICAL FIELD
[0002] The invention relates to an ink composition and an image
forming method.
BACKGROUND ART
[0003] Examples of an image recording method for forming an image
on a recording medium such as paper based on image data signals
include inkjet systems.
[0004] As an ink composition that can be cured by irradiation of
active energy rays such as UV rays and used as an ink composition
for inkjet recording (i.e., an active energy ray-curable ink
composition), an ink composition which is cured at a high
sensitivity and can form an image with high quality is
demanded.
[0005] As for an active energy ray-curable ink composition, an ink
composition used in combination with a polymerizable monomer and a
photopolymerization initiator is suggested, for example (for
example, see, Japanese Patent Application Laid-Open (JP-A) No.
5-214280).
[0006] Furthermore, in JP-A No. 2000-211249, an active energy
ray-curable inkjet ink-absorbing layer composition including
polyfunctional (meth)acrylate and at least two maleimide skeletons
in a molecule thereof is disclosed.
SUMMARY OF INVENTION
Technical Problem
[0007] However, JP-A No. 5-214280 does not disclose improving a
phenomenon (i.e., blocking) of ink transfer onto other printed
matter superposed when printed recording media are superposed on
each other.
[0008] Furthermore, JP-A No. 2000-211249 is directed to a technique
relating to an ink-absorbing layer, and an jetting property of an
ink composition at the time of forming an image by an inkjet method
and blocking resistance of an image to be formed is not
discussed.
[0009] The invention has been made in view of the above problems,
and an object of the invention is to achieve the followings.
[0010] That is, an object of the invention is to provide an ink
composition which is favorable for inkjet recording and which has
and excellent jetting property at the time of forming an image and
an excellent blocking resistance of an image to be formed, and an
image forming method.
Solution to Problem
[0011] Accordingly, the means for solving the above problems are as
follows.
[0012] <1> An ink composition comprising:
[0013] (component A) a compound having a group represented by the
following Formula (1);
[0014] (component B1) a monofunctional polymerizable compound;
and
[0015] (component C) a coloring material:
##STR00002##
[0016] wherein, in Formula (1), R.sup.a and R.sup.b each
independently represent a hydrogen atom or an alkyl group having 1
to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to each other
to form a 4- to 6-membered alicyclic structure; R.sup.a and R.sup.b
do not represent a hydrogen atom at the same time; and * represents
a bonding site.
[0017] <2> The ink composition according to <1>,
further comprising (component B2) a polyfunctional polymerizable
compound.
[0018] <3> The ink composition according to <2>,
wherein a total content of the (component B1) and the (component
B2) in the ink composition is from 50% by mass to 90% by mass with
respect to the ink composition.
[0019] <4> The ink composition according to <2> or
<3>, wherein a content of the (component B1) monofunctional
polymerizable compound is from 50% by mass to 99.5% by mass with
respect to a total content of the (component B1) monofunctional
polymerizable compound and the (component B2) polyfunctional
polymerizable compound.
[0020] <5> The ink composition according to any one of
<1> to <4>, wherein a content of the (component A) in
the ink composition is from 0.1% by mass to 20% by mass with
respect to the ink composition.
[0021] <6> The ink composition according to <5>,
wherein a content of the (component A) in the ink composition is
from 1% by mass to 15% by mass with respect to the ink
composition.
[0022] <7> The ink composition according to any one of
<1> to <6>, wherein the (component A) is a compound
represented by the following Formula (11):
##STR00003##
[0023] wherein, in Formula (11), R.sup.a and R.sup.b each
independently represent a hydrogen atom or an alkyl group having 1
to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to each other
to form a 4- to 6-membered alicyclic structure; R.sup.a and R.sup.b
do not represent a hydrogen atom at the same time; R.sup.c
represents a hydrogen atom or a methyl group; Z represents a single
bond, --COO--* or --CONR.sup.d--*; R.sup.d represents a hydrogen
atom or an alkyl group having 1 to 4 carbon atoms; * represents a
bonding site with X; and X represents a group selected from the
group consisting of an alkylene group, an arylene group, an
aralkylene group, and an alkenylene group.
[0024] <8> The ink composition according to <7>,
wherein X in Formula (11) is an alkylene group having 1 to 12
carbon atoms, an arylene group having 6 to 14 carbon atoms, or an
aralkylene group having 7 to 20 carbon atoms.
[0025] <9> The ink composition according to any one of
<1> to <6>, wherein the (component A) is a polymer
including a repeating unit represented by the following Formula
(1a):
##STR00004##
[0026] wherein, in Formula (1a), R.sup.a and R.sup.b each
independently represent a hydrogen atom or an alkyl group having 1
to 4 carbon atoms; R.sup.a and R.sup.b may be bonded to each other
to form a 4- to 6-membered alicyclic structure; R.sup.a and R.sup.b
do not represent a hydrogen atom at the same time; R.sup.c
represents a hydrogen atom or a methyl group; Z represents a single
bond, --COO--* or --CONR.sup.d--*; R.sup.d represents a hydrogen
atom or an alkyl group having 1 to 4 carbon atoms; * represents a
bonding site with X; and X represents a group selected from the
group consisting of an alkylene group, an arylene group, an
aralkylene group, and an alkenylene group.
[0027] <10> The ink composition according to <9>,
wherein X in Formula (1a) is an alkylene group having 1 to 12
carbon atoms, an arylene group having 6 to 14 carbon atoms, or an
aralkylene group having 7 to 20 carbon atoms.
[0028] <11> The ink composition according to any one of
<1> to <10>, comprising an N-vinyl compound as the
(component B 1) monofunctional polymerizable compound.
[0029] <12> The ink composition according to <11>,
wherein the N-vinyl compound is represented by the following
Formula (V):
##STR00005##
[0030] wherein, in Formula (V), m represents an integer of from 1
to 5.
[0031] <13> The ink composition according to any one of
<1> to <12>, being an ink composition for inkjet
recording.
[0032] <14> An image forming method comprising:
[0033] applying the ink composition according to any one of
<1> to <13> onto a recording medium; and
[0034] irradiating the applied ink composition with an active
energy ray.
[0035] <15> The image forming method according to <14>,
wherein the applying of the ink composition is performed according
to an inkjet method.
Advantageous Effect of Invention
[0036] According to the invention, an ink composition which is
favorable for inkjet recording and which has an excellent jetting
property at the time of forming an image and an excellent blocking
resistance of an imageto be formed and an image forming method can
be provided.
BEST MODE FOR CARRYING OUT THE INVENTION
[0037] [Ink Composition]
[0038] The ink composition of the invention includes (component A)
a compound having a group represented by the following Formula (1),
(component B1) a monofunctional polymerizable compound, and
(component C) a coloring material. Hereinbelow, the ink composition
of the invention is explained in order.
##STR00006##
(in Formula (1), R.sup.a and R.sup.b each independently represent a
hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and
R.sup.a and R.sup.b may be bonded to each other to form a 4- to
6-membered alicyclic structure, and R.sup.a and R.sup.b do not
represent a hydrogen atom at the same time. * represents a bonding
site).
[0039] In the present specification, the numbers before and after
"-" or "to" in a range represents using "-" or "to" are included in
that range as the minimum and maximum values
[0040] Hereinbelow, the ink composition of the invention is
explained in greater detail.
[0041] [(Component A) Compound Having a Group Represented by
Formula (1)]
[0042] The ink composition of the invention includes a compound
having a group represented by the following Formula (1) as an
essential component.
##STR00007##
(in Formula (1), R.sup.a and R.sup.b each independently represent a
hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and
R.sup.a and R.sup.b may be bonded to each other to form a 4- to
6-membered alicyclic structure, and R.sup.a and R.sup.b do not
represent a hydrogen atom at the same time. * represents a bonding
site).
[0043] In Formula (1), R.sup.a and R.sup.b each independently
represent a hydrogen atom or an alkyl group having 1 to 4 carbon
atoms, and R.sup.a and R.sup.b do not represent a hydrogen atom at
the same time. R.sup.a and R.sup.b may be simultaneously an alkyl
group, or one of them may be an alkyl group. However, it is
preferable that R.sup.a and R.sup.b are simultaneously an alkyl
group.
[0044] In Formula (1), when R.sup.a and R.sup.b are an alkyl group
having 1 to 4 carbon atoms, an alkyl group having 1 to 2 carbon
atoms (i.e., methyl group and ethyl group) is preferable, and an
alkyl group having 1 carbon atom (i.e., methyl group) is
particularly preferable. Those groups may have a linear structure
or a branched structure. Specific examples thereof include a methyl
group, an ethyl group, a propyl group, an isopropyl group, a butyl
group, an isobutyl group, a sec-butyl group, and a t-butyl group.
R.sup.a and R.sup.b may be bonded to each other to form a 4- to
6-membered alicyclic structure, and when an alicyclic structure is
formed, it is preferable to form a 5- to 6-membered alicyclic
structure and it is more preferable to form a 6-membered alicyclic
structure.
[0045] The (component A) in the invention is preferably water
soluble or water dispersible and more preferably water soluble.
Specifically, 1 g of the (component A) is preferably dissolved or
dispersed in an emulsion state, in 30 ml of water, is more
preferably dissolved or dispersed, in an emulsion state in 20 ml of
water, and is particularly preferably dissolved or dispersed in an
emulsion state, in 10 ml of water.
[0046] Specific examples of the group represented by Formula (1) in
the (component A) in the invention are described below. However, it
is evident that the invention is not limited to these.
##STR00008##
[0047] The (component A) may be a low molecular compound having a
molecular weight of about 200 to about 2,000 or a polymer compound
having a weight average molecular weight of more than 5,000. The
(component A) may contain both the low molecular compound and the
polymer compound, but the (component A) is preferably a polymer
compound having a molecular weight of more than 5,000.
[0048] When the (component A) is a low molecular compound having a
molecular weight of about 200 to about 2,000 it is preferably a
compound represented by the following Formula (11).
##STR00009##
[0049] (in Formula (11), R.sup.a and R.sup.b each independently
represent a hydrogen atom or an alkyl group having 1 to 4 carbon
atoms, and R.sup.a and R.sup.b may be bonded to each other to form
a 4- to 6-membered alicyclic structure, and R.sup.a and R.sup.b do
not represent a hydrogen atom at the same time. R.sup.c represents
a hydrogen atom or a methyl group. Z represents a single bond,
--COO--* or --CONR.sup.d--*, and R.sup.d represents a hydrogen atom
or an alkyl group having 1 to 4 carbon atoms. * represents a
bonding site with X. X represents a group selected from the group
consisting of an alkylene group, an arylene group, an aralkylene
group, and an alkenylene group).
[0050] In Formula (11), when R.sup.a and R.sup.b are an alkyl group
having 1 to 4 carbon atoms, the alkyl group has the same
definitions as those exemplified for R.sup.a and R.sup.b in Formula
(1) described above (including the preferred range).
[0051] In Formula (11), R.sup.c represents a hydrogen atom or a
methyl group. R.sup.c is preferably a methyl group.
[0052] In Formula (11), Z represents a single bond, --COO--* or
--CONR.sup.d--*, and R.sup.d represents a hydrogen atom or an alkyl
group having 1 to 4 carbon atoms. * represents a bonding site with
X. Z is preferably --COO--*.
[0053] Further, R.sup.d represents a hydrogen atom or an alkyl
group having 1 to 4 carbon atoms. The alkyl group having 1 to 4
carbon atoms may have a linear structure or a branched structure.
Specific examples thereof include a methyl group, an ethyl group, a
propyl group, an isopropyl group, a butyl group, an isobutyl group,
a sec-butyl group, and a t-butyl group. R.sup.d is preferably a
hydrogen atom or an alkyl group having 1 to 2 carbon atoms, that
is, a methyl group or an ethyl group, and particularly preferably a
hydrogen atom. R.sup.d may have a substituent group or may have no
substituent group, but it is preferable that R.sup.d does not have
a substituent group.
[0054] In Formula (11), X represents a group selected from the
group consisting of an alkylene group, an arylene group, an
aralkylene group, and an alkenylene group. X is preferably a group
selected from the group consisting of an alkylene group, an arylene
group, and an aralkylene group, more preferably an alkylene group
having 1 to 12 carbon atoms, an arylene group having 6 to 14 carbon
atoms, and an aralkylene group having 7 to 20 carbon atoms, and
particularly preferably an alkylene group having 1 to 12 carbon
atoms. Those groups may have a substituent group or may have no
substituent group, and may have an ether bond, an ester bond, an
amide bond, or a urethane bond.
[0055] When the (component A) includes the compound represented by
Formula (11), preferred examples of the (component A) include the
following compounds (11-1) to (11-17), but the invention is not
limited to these.
##STR00010## ##STR00011## ##STR00012##
[0056] When the (component A) is a polymer compound having a weight
average molecular weight of more than 5,000, the (component A) is
preferably a polymer formed by polymerizing a compound represented
by Formula (11), and the (component A) may be either a homopolymer
or a copolymer formed with a compound other than Formula (11). In
addition, the polymer may have a linear shape, a branched shape, or
a block structure. When the (component A) is a copolymer formed
with a compound other than Formula (11), examples of other compound
include well-known monomers such as acrylic acid esters,
methacrylic acid esters, acrylamides, methacrylamides, vinyl
esters, styrenes, acrylonitrile, maleic anhydride, and maleic acid
imide.
[0057] Examples of acrylic acid esters include methyl acrylate,
ethyl acrylate, (n- or i-)propyl acrylate, n-butyl acrylate,
isobutyl acrylate, sec-butyl acrylate, t-butyl acrylate, amyl
acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, chloroethyl
acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate,
5-hydroxypentyl acrylate, cyclohexyl acrylate, allyl acrylate,
trimethylol propane monoacrylate, pentaerythritol monoacrylate,
glycidyl acrylate, benzyl acrylate, methoxybenzyl acrylate,
chlorobenzyl acrylate, 2-(p-hydroxyphenyl)ethyl acrylate, furfuryl
acrylate, tetrahydrofurfuryl acrylate, phenyl acrylate,
chlorophenyl acrylate, and sulfamoylphenyl acrylate.
[0058] Examples of methacrylic acid esters include methyl
methacrylate, ethyl methacrylate, (n- or i-)propyl methacrylate,
n-butyl methacrylate, isobutyl methacrylate, sec-butyl
methacrylate, t-butyl methacrylate, amyl methacrylate, 2-ethylhexyl
methacrylate, dodecyl methacrylate, chloroethyl methacrylate,
2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate,
5-hydroxypentyl methacrylate, cyclohexyl methacrylate, allyl
methacrylate, trimethylol propane monomethacrylate, pentaerythritol
monomethacrylate, glycidyl methacrylate, methoxybenzyl
methacrylate, chlorobenzyl methacrylate, 2-(p-hydroxyphenyl)ethyl
methacrylate, furfuryl methacrylate, tetrahydrofurfuryl
methacrylate, phenyl methacrylate, chlorophenyl methacrylate, and
sulfamoylphenyl methacrylate.
[0059] Examples of acrylamides include acrylamide, N-methyl
acrylamide, N-ethyl acrylamide, N-propyl acrylamide, N-butyl
acrylamide, N-benzyl acrylamide, N-hydroxyethyl acrylamide,
N-phenyl acrylamide, N-tolyl acrylamide,
N-(p-hydroxyphenyl)acrylamide, N-(sulfamoylphenyl)acrylamide,
N-(phenylsulfonyl)acrylamide, N-(tolylsulfonyl)acrylamide,
N,N-dimethyl acrylamide, N-methyl-N-phenyl acrylamide, and
N-hydroxyethyl-N-methyl acrylamide.
[0060] Examples of methacrylamides include methacrylamide, N-methyl
methacrylamide, N-ethyl methacrylamide, N-propyl methacrylamide,
N-butyl methacrylamide, N-benzyl methacrylamide, N-hydroxyethyl
methacrylamide, N-phenyl methacrylamide, N-tolyl methacrylamide,
N-(p-hydroxyphenyl)methacrylamide,
N-(sulfamoylphenyl)methacrylamide,
N-(phenylsulfonyl)methacrylamide, N-(tolylsulfonyl)methacrylamide,
N,N-dimethyl methacrylamide, N-methyl-N-phenyl methacrylamide, and
N-hydroxyethyl-N-methyl methacrylamide.
[0061] Examples of vinyl esters include vinyl acetate, vinyl
butyrate, and vinyl benzoate.
[0062] Examples of styrenes include styrene, methyl styrene,
dimethyl styrene, trimethyl styrene, ethyl styrene, propyl styrene,
cyclohexyl styrene, chloromethyl styrene, trifluoromethyl styrene,
ethoxymethyl styrene, acetoxymethyl styrene, methoxy styrene,
dimethoxy styrene, chloro styrene, dichloro styrene, bromo styrene,
iodo styrene, fluoro styrene, and carboxy styrene.
[0063] Of those monomers, when the (component A) is a copolymer, it
is preferable to form a copolymer with acrylic acid esters,
methacrylic acid esters, vinyl esters, styrenes, or
acrylonitrile.
[0064] When the (component A) is a polymer compound having a weight
average molecular weight of more than 5,000, the (component A) is
particularly preferably a polymer including a repeating unit
represented by the following Formula (1a).
##STR00013##
[0065] (in Formula (1a), R.sup.a and R.sup.b each independently
represent a hydrogen atom or an alkyl group having 1 to 4 carbon
atoms, and R.sup.a and R.sup.b may be bonded to each other to form
a 4- to 6-membered alicyclic structure, and R.sup.a and R.sup.b do
not represent a hydrogen atom at the same time. R.sup.c represents
a hydrogen atom or a methyl group. Z represents a single bond,
--COO--* or --CONR.sup.d--*, and R.sup.d represents a hydrogen atom
or an alkyl group having 1 to 4 carbon atoms. * represents a
bonding site with X. X represents a group selected from the group
consisting of an alkylene group, an arylene group, an aralkylene
group, and an alkenylene group).
[0066] In Formula (1a), R.sup.a, R.sup.b, and R.sup.c have the same
definitions as those exemplified for R.sup.a, R.sup.b, and R.sup.c
in Formula (1) described above (including the preferred range),
respectively.
[0067] In Formula (1a), X and Z have the same definitions as those
exemplified with X and Z in Formula (11) described above (including
the preferred range), respectively.
[0068] When the (component A) includes the repeating unit
represented by Formula (1a), preferred examples of the (component
A) include a polymer including the following repeating units (1a-1)
to (1a-13), but the invention is not limited to these.
##STR00014## ##STR00015##
[0069] Preferred examples the (component A) in the invention in a
case of the (component A) is a polymer include the following
polymers.
##STR00016##
(weight average molecular weight: 14,000)
##STR00017##
(weight average molecular weight: 18,000)
##STR00018##
(weight average molecular weight: 19,000)
##STR00019##
(weight average molecular weight: 9,000)
[0070] The content of the (component A) in the ink composition of
the invention is preferably from 0.1 to 20% by mass, more
preferably from 1 to 15% by mass, and particularly preferably from
2 to 12% by mass, with respect to the ink composition.
[0071] [(Component B1) Monofunctional Polymerizable Compound]
[0072] The ink composition of the invention includes (component B1)
a monofunctional polymerizable compound as an essential component.
The monofunctional polymerizable compound used in the ink
composition of the invention is not particularly limited as long as
it is a polymerizable compound having one polymerizable group.
[0073] The monofunctional polymerizable compound used in the ink
composition of the invention may be either a radical-polymerizable
compound or a cationic polymerizable compound. However, a
radical-polymerizable compound is preferable, and examples thereof
include a radical-polymerizable compound having an ethylenically
unsaturated bond. More specifically, it is enough that a compound
includes, in a molecule thereof, at least one ethylenically
unsaturated bond that is radically polymerizable.
[0074] Examples of the monofunctional polymerizable compound having
an ethylenically unsaturated bond that is radically polymerizable
include unsaturated carboxylic acids such as acrylic acid,
methacrylic acid, itaconic acid, crotonic acid, isocrotonic acid,
and maleic acid, unsaturated carboxylic acid esters and salts
thereof; anhydrides having an ethylenically unsaturated group;
acrylonitrile; and styrene.
[0075] Further examples thereof include macromonomers such as
various unsaturated polyesters, unsaturated polyethers, unsaturated
polyamides, and unsaturated polyurethanes.
[0076] Preferred examples of the monofunctional compound include a
(meth)acrylate compound such as 2-hydroxyethyl acrylate,
butoxyethyl acrylate, carbitol acrylate, cyclohexyl acrylate,
tetrahydrofurfuryl acrylate, benzyl acrylate, tridecyl acrylate,
2-phenoxyethyl acrylate, N-methylol acrylamide, diacetone
acrylamide, epoxyacrylate, isobornyl acrylate, dicyclopentenyl
acrylate, dicyclopentenyloxyethyl acrylate, dicyclopentanyl
acrylate, 2-hydroxy-3-phenoxypropyl acrylate,
2-acryloyloxyethylphthalic acid, methoxy-polyethylene glycol
acrylate, 2-acryloyloxyethyl-2-hydroxyethylphthalic acid, cyclic
trimethylol propane formal acrylate, 2-(2-ethoxyethoxy)ethyl
acrylate, 2-methoxyethyl acrylate, 3-methoxybutyl acrylate,
ethoxylated phenyl acrylate, 2-acryloyloxyethyl succinic acid,
nonylphenol EO adduct acrylate, phenoxy-polyethylene glycol
acrylate, 2-acryloyloxyethylhexahydrophthalic acid, lactone
modified acrylate, stearyl acrylate, isoamyl acrylate, isomyristyl
acrylate, isostearyl acrylate, or lactone modified acrylate;
[0077] a methacrylate compound such as methyl methacrylate, n-butyl
methacrylate, allyl methacrylate, glycidyl methacrylate, benzyl
methacrylate, or dimethylaminomethyl methacrylate;
[0078] an allyl compound such as allylglycidyl ether; and
[0079] a (meth)acrylamide compound such as (meth)acrylamide,
N-methyl (meth)acrylamide, N-ethyl (meth)acrylamide, N-propyl
(meth)acrylamide, N-isopropyl (meth)acrylamide, N-butyl
(meth)acrylamide, N-sec-butyl (meth)acrylamide, N-tert-butyl
(meth)acrylamide, N-cyclohexyl (meth)acrylamide, N-phenyl
(meth)acrylamide, N,N-dimethyl (meth)acrylamide,
1-(meth)acryloylpyrrolidine, N-methylol (meth)acrylamide,
N-methoxyethyl (meth)acrylamide, N-2-hydroxyethyl (meth)acrylamide,
N-[3-dimethylaminopropyl](meth)acrylamide,
N-1,1-dimethyl-3-oxobutyl (meth)acrylamide, or 4-acryloyl
morpholine.
[0080] Furthermore, preferred examples thereof also include a
monofunctional vinyl ether compound. Specific examples of the
monofunctional vinyl ether compound include methyl vinyl ether,
ethyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether,
n-butyl vinyl ether, isobutyl vinyl ether, t-butyl vinyl ether,
n-octadecyl vinyl ether, 2-ethylhexyl vinyl ether, n-nonyl vinyl
ether, dodecyl vinyl ether, octadecyl vinyl ether, cyclohexyl vinyl
ether, cyclohexylmethyl vinyl ether, 4-methylcyclohexylmethyl vinyl
ether, benzyl vinyl ether, dicyclopentenyl vinyl ether,
2-dicyclopentenoxyethyl vinyl ether, methoxyethyl vinyl ether,
ethoxyethyl vinyl ether, butoxyethyl vinyl ether,
methoxyethoxyethyl vinyl ether, ethoxyethoxyethyl vinyl ether,
methoxypolyethylene glycol vinyl ether, tetrahydrofurfuryl vinyl
ether, 2-hydroxyethyl vinyl ether, 2-hydroxypropyl vinyl ether,
4-hydroxybutyl vinyl ether, 4-hydroxymethyl cyclohexylmethyl vinyl
ether, diethylene glycol monovinyl ether, polyethylene glycol vinyl
ether, chloroethyl vinyl ether, chlorobutyl vinyl ether,
chloroethoxyethyl vinyl ether, phenylethyl vinyl ether,
phenoxypolyethylene glycol vinyl ether, cyclohexane diemethanol
monovinyl ether, and isopropenyl ether-O-propylene carbonate.
[0081] Furthermore, preferred examples thereof also include an
N-vinyl compound such as N-vinyl lactams or N-vinyl formamide.
Preferred examples of the N-vinyl compound are represented by the
following formula.
##STR00020##
[0082] In the above formula, m represents an integer of from 1 to 5
and m is preferably an integer of from 2 to 4, m is more preferably
2 or 4, and it is particularly preferable that m is 4, namely, m is
N-vinyl caprolactam.
[0083] Of those described above, the monofunctional polymerizable
compound in the invention is preferably an N-vinyl compound.
[0084] In the invention, a molecular weight of the (component B1)
monofunctional polymerizable compound is preferably from 130 to
3000, and more preferably from 130 to 500.
[0085] The content of the (component B1) monofunctional
polymerizable compound in the ink composition of the invention is
preferably from 5% by mass to 90% by mass, more preferably from 20%
by mass to 85% by mass, and particularly preferably from 35% by
mass to 80% by mass, with respect to the ink composition.
[0086] [(Component B2) Polyfunctional Polymerizable Compound]
[0087] It is preferable that the ink composition of the invention
further includes a polyfunctional polymerizable compound. The
polyfunctional polymerizable compound which may be used in the ink
composition of the invention is not particularly limited as long as
it is a polymerizable compound having at least two polymerizable
groups.
[0088] Examples of the radically polymerizable-polyfunctional
compound include an acrylate compound such as
bis(4-acryloxypolyethoxyphenyl)propane, tripropylene glycol
diacrylate, polyethylene glycol diacrylate, polypropylene glycol
diacrylate, dipentaerythritol tetraacrylate, trimethylol propane
(PO modified) triacrylate, oligoester acrylate, hydroxypivalic acid
neopentyl glycol diacrylate, tetramethylol methane triacrylate,
dimethylol tricyclodecane diacrylate, modified glycerin
triacrylate, bisphenol A diglycidyl ether acrylic acid adduct,
modified bisphenol A diacrylate, PO adduct diacrylate of bisphenol
A, EI adduct diacrylate of bisphenol A, dipentaerythritol
hexaacrylate, propylene glycol diglycidyl ether acrylic acid
adduct, or ditrimethylol propane tetraacrylate; and
[0089] a methacrylate compound such as polyethylene glycol
dimethacrylate or polypropylene glycol dimethacrylate
2,2-bis(4-methacryloxypolyethoxyphenyl)propane.
[0090] Further, examples thereof also include an allyl compound
such as diallyl phthalate or triallyl trimellitate.
[0091] PO represents propylene oxide and E0 represents ethylene
oxide.
[0092] Examples thereof also include polyfunctional vinyl ether.
Examples of the polyfunctional vinyl ether include divinyl ethers
such as ethylene glycol divinyl ether, diethylene glycol divinyl
ether, triethylene glycol divinyl ether, polyethylene glycol
divinyl ether, propylene glycol divinyl ether, dipropylene glycol
divinyl ether, butylene glycol divinyl ether, butanediol divinyl
ether, hexanediol divinyl ether, cyclohexane dimethanol divinyl
ether, bisphenol A alkylene oxide divinyl ether, and bisphenol F
alkylene oxide divinyl ether; and
[0093] polyfunctional vinyl ethers such as trimethylol ethane
trivinyl ether, trimethylol propane trivinyl ether, ditrimethylol
propane tetravinyl ether, glycerin trivinyl ether, pentaerythritol
tetravinyl ether, dipentaerythritol pentavinyl ether,
dipentaerythritol hexavinyl ether, ethylene oxide added trimethylol
propane trivinyl ether, propylene oxide added trimethylol propane
trivinyl ether, ethylene oxide added ditrimethylol propane
tetravinyl ether, propylene oxide added ditrimethylol propane
tetravinyl ether, ethylene oxide added pentaerythritol tetravinyl
ether, propylene oxide added pentaerythritol tetravinyl ether,
ethylene oxide added dipentaerythritol hexavinyl ether, and
propylene oxide added dipentaerythritol hexavinyl ether.
[0094] Further, as a polyfunctional polymerizable compound that is
radically polymerizable, active energy ray-curable polymerizable
compounds that are used in the polymerizable compound described in
publications of JP-A No. 7-159983, Japanese Patent Application
Publication (JP-B) No. 7-31399, JP-A No. 8-224982, JP-A No. 10-863,
JP-A No. 9-134011, or Japanese Patent Application National
Publication (Laid-Open) No. 2004-514014 are known, and these may
also be used in the ink composition of the invention.
[0095] A molecular weight of the polyfunctional polymerizable
compound is preferably from 130 to 3000, and more preferably from
130 to 500.
[0096] The content of the polyfunctional polymerizable compound in
the ink composition is preferably 75% by mass or less, more
preferably from 0.1% by mass to 60% by mass, and particularly
preferably from 0.5% by mass to 50% by mass, with respect to the
ink composition.
[0097] A total content of the (component B1) and the (component
B2), which may be included if required, in the ink composition of
the invention is preferably from 50% by mass to 90% by mass, more
preferably from 60% by mass to 85% by mass, and particularly
preferably from 65% by mass to 80% by mass, with respect to the ink
composition.
[0098] The content of the (component B1) the monofunctional
polymerizable compound with respect to all polymerizable compounds
in the ink composition of the invention (a total content of the
(component B1) the monofunctional polymerizable compound and the
(component B2) polyfunctional polymerizable compound, which may be
included if required) is preferably from 50 to 99.5% by mass, more
preferably from 55 to 98% by mass, and particularly preferably from
60 to 95% by mass.
[0099] [(Component C) Coloring Material]
[0100] The ink composition for inkjet recording according to the
invention includes (component C) a coloring material.
[0101] The coloring material which may be used in the invention is
preferably a coloring material that is formed from an organic
pigment.
[0102] As the organic pigment which may be used in the invention,
for example, the organic pigments of the following numbers that are
described in Color Index may be used.
[0103] Examples of a red or magenta pigment include Pigment Red 3,
5, 19, 22, 31, 38, 43, 48:1, 48:2, 48:3, 48:4, 48:5, 49:1, 53:1,
57:1, 57:2, 58:4, 63:1, 81, 81:1, 81:2, 81:3, 81:4, 88, 104, 108,
112, 122, 123, 144, 146, 149, 166, 168, 169, 170, 177, 178, 179,
184, 185, 208, 216, 226, and 257, Pigment Violet 3, 19, 23, 29, 30,
37, 50, and 88, and Pigment Orange 13, 16, 20, and 36.
[0104] Examples of a blue or cyan pigment include Pigment Blue 1,
15, 15:1, 15:2, 15:3, 15:4, 15:6, 16, 17-1, 22, 27, 28, 29, 36, and
60.
[0105] Examples of a green pigment include Pigment Green 7, 26, 36,
and 50.
[0106] Examples of a yellow pigment include Pigment Yellow 1, 3,
12, 13, 14, 17, 34, 35, 37, 55, 74, 81, 83, 93, 94, 95, 97, 108,
109, 110, 120, 137, 138, 139, 153, 154, 155, 157, 166, 167, 168,
180, 185, 193, and 213.
[0107] Examples of a black pigment include Pigment Black 7, 28, and
26.
[0108] The pigments may be appropriately selected and used
depending on the purpose.
[0109] The coloring material which may be used in the invention is
preferably subjected to a dispersion treatment after added into the
ink composition of the invention such that the coloring material is
suitably dispersed in the corresponding ink. For dispersing the
coloring material that is formed from an organic pigment, various
dispersers such as a ball mill, a sand mill, an attritor, a roll
mill, an agitator, a Henschel mixer, a colloid mill, an ultrasonic
homogenizer, a pearl mill, a wet jet mill, and a paint shaker can
be used, for example.
[0110] Further, it is also possible to add a dispersant when
dispersing an organic pigment. Although types of the dispersant are
not particularly limited, it is preferable to use a polymer
dispersant. Examples of the polymer dispersant include SOLSPERSE
series manufactured by Noveon and AJISPER series manufactured by
Ajinomoto Fine-Techno Co., Inc. As a dispersion aid, a synergist
may be used according to the type of pigment. In the invention, the
dispersant and dispersion aid are added preferably in an amount of
from 1 to 50 parts by mass with respect to 100 parts by mass of the
coloring material.
[0111] The coloring material that is formed from an organic pigment
may be mixed by direct addition together with each component when
the ink composition of the invention is prepared. However, for
improving a dispersion property, the coloring material that is
formed form an organic pigment is added in advance to a dispersion
medium such as a solvent, a specific heterocyclic compound in the
invention, or other polymerizable compound which may be used in
combination if necessary, dispersed or dissolved homogeneously, and
then mixed.
[0112] One type or two or more types of the coloring material that
is formed from an organic pigment may be suitably selected and used
depending on purpose of use of the ink composition.
[0113] When a coloring material such as pigment, which is present
in a solid state, is used in the ink composition of the invention,
the coloring material, dispersant, and dispersion medium are
selected and dispersion condition and filtration condition are set
such that the average particle diameter of the coloring material
particles is preferably from 0.005 to 0.5 .mu.m, more preferably
from 0.01 to 0.45 .mu.m, and still more preferably from 0.015 to
0.4 .mu.m.
[0114] The content of the coloring material that is formed from an
organic pigment in the ink composition of the invention is suitably
selected depending of purpose of use of the ink composition.
However, considering physical properties and coloring property of
the composition, generally, it is preferably from 0.5 to 10% by
mass, and more preferably from 1 to 8% by mass, with respect to the
total mass of the ink composition.
[0115] In addition to the essential components described above, the
ink composition of the invention may also include other components
for improving physical properties or the like within the range that
the effect of the invention is not adversely affected.
[0116] Hereinbelow, these optional components are described.
[0117] [Polymerization Initiator]
[0118] The ink composition of the invention may include a
polymerization inhibitor when necessary, although it is not
necessarily required to include a polymerization initiator in
addition to the essential components described above. The
polymerization initiator can be any one of a thermal polymerization
initiator and a photopolymerization initiator. However, a
photopolymerization initiator is preferable.
[0119] As for the photopolymerization initiator, a known
photopolymerization initiator may be suitably selected and used,
depending on the type of a polymerizable compound used in
combination and purpose of use of the ink composition.
[0120] The photopolymerization initiator used in the ink
composition of the invention is a compound which absorbs external
energy (light) and generates a polymerization initiating species.
As the photopolymerization initiator, a known compound can be used.
In the photopolymerization initiator, the light for initiating
polymerization indicates active energy ray, that is, .gamma. ray,
.beta. ray, electronic beam, ultraviolet ray, visible ray, and
infrared ray, and preferably ultraviolet ray.
[0121] Examples of the photopolymerization initiator which may be
preferably used in the invention include aromatic ketones, acyl
phosphine oxide compounds, aromatic onium salt compound, organic
peroxides, thio compounds, hexaaryl biimidazole compounds,
ketooxime ester compounds, borate compounds, azinium compounds,
metallocene compounds, active ester compounds, compounds having a
carbon-halogen bond, and alkylamine compounds.
[0122] In the invention, when a photopolymerization initiator is
used, the photopolymerization initiator may be used singly or two
or more thereof may be used in combination. From the viewpoint of
the effect, it is preferable to use two or more radical
polymerization initiators in combination. From the viewpoint of
curability of the ink composition, aromatic ketones and acyl
phosphine oxide compounds are preferable, as a photopolymerization
initiator. In addition, when two or more photopolymerization
initiators are used in combination, for example, preferred examples
of the combination include a combination of aromatic ketones and
acyl phosphine oxide compounds.
[0123] In the invention, the content of the photopolymerization
initiator is preferably 5% by mass or less, more preferably 3% by
mass or less, and still more preferably 1% by mass or less, with
respect to the total mass of the ink composition.
[0124] [Sensitizing Pigment]
[0125] A sensitizing pigment may be added to the ink composition of
the invention, for a purpose of promoting a photoreaction by
irradiation of active energy ray. The sensitizing pigment absorbs
specific active energy ray to be in an electronically-excited
state. The sensitizing pigment which is in an
electronically-excited state contacts the polymerization initiator
to cause an action such as an energy transfer or the like, as a
result of which, a photoreaction is promoted.
[0126] Preferred examples of the sensitizing pigment include those
that belong to the following compounds and that have an absorption
wavelength in a region of from 350 nm to 450 nm.
[0127] Examples thereof include polynuclear aromatics (for example,
anthracene, pyrene, perylene, and triphenylene), thioxantones (for
example, isopropyl thioxantones), xanthenes (for example,
fluorescein, eosin, erythrosin, rhodamine B, and rose bengal),
cyanines (for example, thiacarbocyanine and oxacarbocyanine),
merocyanines (for example, merocyanine and carbomerocyanine),
thiazines (for example, thionine, methylene blue, and toluidine
blue), acridines (for example, acridine orange, chloroflavine, and
acriflavine), anthraquinones (for example, anthraquinone),
squaryliums (for example, squarylium), and coumarins (for example,
7-diethylamino-4-methyl coumarin), and preferred examples thereof
include thioxantones and merocyanines
[0128] [Co-Sensitizer]
[0129] The ink composition of the invention may also include a
co-sensitizer. In the invention, the co-sensitizer has a function
that sensitivity of a sensitizing pigment to active energy ray is
further improved, the polymerization inhibition of a polymerizable
compound by oxygen is suppressed, or the like.
[0130] Examples of the co-sensitizer include amines, for example,
compounds such as those described in "Journal of Polymer Science"
vol. 10, p 3173 (1972), written by M. R. Sander et al, JP-B No.
44-20189, JP-A No. 51-82102, JP-A No. 52-134692, JP-A No.
59-138205, JP-A No. 60-84305, JP-A No. 62-18537, JP-A No. 64-33104,
and Research Disclosure No. 33825. Specific examples of the
co-sensitizer include triethanolamine, p-dimethylamino benzoic acid
ethyl ester, p-formyl dimethylaniline, and
p-methylthiodimethylaniline.
[0131] Other examples of the co-sensitizer include thiols and
sulfides, such as thiol compounds as those described in JP-A No.
53-702, JP-B No. 55-500806, and JP-A No. 5-142772 and disulfide
compounds described in JP-A No. 56-75643. Specific examples thereof
include 2-mercaptobenzothiazole, 2-mercaptobenzoxazole,
2-mercaptobenzoimidazole, 2-mercapto-4(3H)-quinazoline, and
.beta.-mercaptonaphthalene.
[0132] Further, other examples of the co-sensitizer include amino
acid compounds (such as N-phenyl glycine), organic metal compounds
as those described in JP-B No. 48-42965 (such as tributyl tin
acetate), hydrogen donating compounds such as those described in
JP-B No. 55-34414, sulfur compounds such as those described in JP-A
No. 6-308727 (such as trithiane), phosphorus compounds such as
those described in JP-A No. 6-250387 (such as diethylphosphite),
and Si--H compounds and Ge--H compounds such as those described in
JP-A No. 8-65779.
[0133] The ink composition of the invention may further include
other various components, if necessary. Examples of other various
components include a polymerization inhibitor and a solvent.
[0134] The polymerization inhibitor may be added from the viewpoint
of increasing the preservability. Moreover, the ink composition of
the invention is preferably heated within a range of from 40 to
60.degree. C., the viscosity is reduced, and then the ink
composition of the invention is jetted, and a polymerization
inhibitor is preferably added in order to prevent clogging of the
head due to the thermal polymerization. It is preferred that the
polymerization inhibitor is added in an amount of from 200 to
20,000 ppm with respect to the total amount of the ink composition
of the invention. Examples of the polymerization inhibitor include
hydroquinone, benzoquinone, p-methoxyphenol, TEMPO, TEMPOL, and
N-nitrosophenylhydroxylamine salt represented by cupferron Al.
[0135] The ink composition of the invention may include a solvent,
if necessary. Examples of the solvent which may be used in the
invention include an organic solvent and water. Preferable examples
of the preferably used solvent include propylene carbonate,
dimethyl succinate, dimethyl glutarate, dimethyl adipate and
mixtures thereof.
[0136] Amount of the organic solvent is, for example, within a
range of from 0.1 to 5% by mass, and preferably from 0.1 to 3% by
mass, with respect to the total amount of the ink composition of
the invention.
[0137] In addition to those described above, a known compound may
be added to the ink composition of the invention, if necessary. For
example, a surfactant, a leveling addition agent, a matting agent;
and a polyester resin, a polyurethane resin, a vinyl resin, an
acrylic resin, a rubber resin, and waxes for adjusting the physical
property of a film, and an antifoaming agent may be suitably
selected and added. Furthermore, it is also preferable that a
tackifier which does not inhibit the polymerization is added to
improve the adhesiveness onto the recording medium such as
polyolefin or PET. Specific examples thereof include tacky polymers
having a high molecular weight described in JP-A No. 2001-49200,
pages 5 to 6 (for example, a copolymer formed from an ester of
(meth)acrylic acid and alcohol including an alkyl group having 1 to
20 carbon atoms, an ester of (meth)acrylic acid and alicyclic
alcohol having 3 to 14 carbon atoms, and an ester of (meth)acrylic
acid and aromatic alcohol having 6 to 14 carbon atoms), and low
molecular weight-tackiness-imparting resins having a polymerizable
unsaturated bond.
[0138] The present inventors have found that the effect of the
invention is obtained by the ink composition of the invention which
includs the (component A), the (component B1), and the (component
C) described above. Although the mechanism is not indentified, the
present inventors assumed as follows.
[0139] That is, it is thought that the (component A) promotes
curing of the composition as a cross-linking compound at the same
time as the (component A) functions as an initiator, and thus
uniformity of the composition after curing is improved and the
blocking resistance is improved. Further, it is thought that, by
having a substituent group such as an alkyl group or the like on a
reactive double bond of the maleimide structure represented by
Formula (1), the curing property is suitably controlled during
jetting of the ink composition so that physical properties of the
cured film is improved, and thus the blocking resistance and
jetting property are improved accordingly. However, the mechanisms
described above are only an assumption, and the invention is not
limited to these.
[0140] [Properties of Ink Composition]
[0141] Preferred physical properties of the ink composition of the
invention are described.
[0142] The viscosity of the ink composition of the invention at a
temperature when jetting (for example, from 20 to 60.degree. C.,
and preferably from 25 to 50.degree. C.) is preferably from 5 to 30
mPas, and more preferably from 7 to 25 mPas, in view of the jetting
property. For example, the viscosity of the ink composition of the
invention at a room temperature (for example, from 25 to 30.degree.
C.) is preferably from 6 to 30 mPas, and more preferably from 8 to
25 mPas. The viscosity of the ink composition is measured, for
example, under the condition at 25.degree. C. using VISCOMETER
TV-22 (manufactured by TOKI SANGYO Co., Ltd.).
[0143] It is preferable that a compositional ratio of the ink
composition of the invention is suitably adjusted such that the
viscosity of the ink composition is within the above range. By
setting the viscosity high at room temperature, ink permeation into
a recording medium is avoided even when a porous recording medium
is used, and thus uncured monomer can be reduced and malodor can be
suppressed. In addition, as ink bleeding at the time of jetting of
liquid ink droplets is prevented, as a result of which, the image
quality is improved.
[0144] Surface tension of the ink composition of the invention at
25.degree. C. is preferably from 17 to 35 mN/m, and more preferably
from 20 to 32 mN/m. When recording is performed on various
recording media such as polyolefin, PET, coated paper, and
non-coated paper, the surface tension is preferably 20 mN/m or more
from the viewpoint of bleeding and permeation, and preferably 32
mN/m or less from the viewpoint of wettability. The surface tension
is measured under the condition at 25.degree. C. using AUTOMATIC
SURFACE TENSIOMETER CBVP-Z (manufactured by Kyowa Interface Science
Co., Ltd.), for example.
[0145] [Image Forming Method]
[0146] The image forming method of the invention includes an ink
application process of applying the ink composition onto a
recording medium, and an irradiation process of irradiating the
applied ink composition with an active energy ray.
[0147] <Ink Application Process>
[0148] Hereinbelow, the ink application process in the image
forming method in the invention is further described. The ink
application process in the invention is not particularly limited as
long as it is a process in which the ink composition is applied
onto a recording medium.
[0149] An inkjet recording device used for the image forming method
of the invention is not particularly limited, and a known inkjet
recording device which can achieve the intended resolution may be
arbitraily selected and used. That is, as long as the inkjet
recording device is any known inkjet recording device including
commercially avairable products, the application of the ink
composition onto a recording medium in the image forming method of
the invention can be performed.
[0150] Examples of the inkjet recording device that can be used in
the invention include a device having an ink supply system, a
temperature sensor, and a heating part.
[0151] The ink supply system includes, for example, a main tank
containing the ink composition of the invention, a supply tube, an
ink supply tank immediately before an inkjet head, a filter, and a
piezo type inkjet head. The piezo type inkjet head may be operated
such that the piezo type inkjet head jets multiplesiz dots of
preferably from 1 to 100 pl, and more preferably from 8 to 30 pl,
with a resolution of preferably from 320.times.320 to
4,000.times.4,000 dpi, more preferably from 400.times.400 to
1,600.times.1,600 dpi, and even more preferably 720.times.720 dpi.
The dpi referred herein means the number of dots per 2.54 cm.
[0152] The ink composition of the invention to be jetted preferably
has a constant temperature. Therefore, the inkjet recording device
preferably includes a part for stabilizing the temperature of the
ink composition. A section to be controlled to have a constant
temperature includes all of the tubes and the members, from an ink
tank (an intermediate tank, if any) to a nozzle jetting face. That
is, the section from the ink supply tank to the inkjet head may be
insulated and heated.
[0153] The method for controlling temperature is not particularly
limited. However, for example, it is preferred that plural
temperature sensors be placed on respective tube parts, and
controlling of heating is performed according to the flow rate of
the ink composition and the environmental temperature. The
temperature sensor can be placed near the ink supply tank and the
inkjet head nozzle. The head unit to be heated is preferably
thermally blocked or insulated such that the device itself is not
influenced by the temperature of the external air. In order to
reduce the time for starting up the printer required for heating,
or reduce the loss of thermal energy, it is preferred that the head
unit be thermally insulated from other units, and the heat capacity
of the entire heating unit be reduced.
[0154] The temperature of the ink composition at jetting is
preferably constant. The control range of the temperature of the
ink composition is preferably .+-.5.degree. C. of the set
temperature, more preferably .+-.2.degree. C. of the set
temperature, and even more preferably .+-.1.degree. C. of the set
temperature.
[0155] In the invention, the recording medium is not particularly
limited, and a known recording medium as a support or a recording
material may be used. Examples of the recording medium include
paper, paper laminated with plastics (for example, polyethylene,
polypropylene, and polystyrene), a metal plate (for example,
aluminum, zinc, and copper), a plastic film (for example, polyvinyl
chloride resin, cellulose diacetate, cellulose triacetate,
cellulose propionate, cellulose butyrate, cellulose acetate
butyrate, cellulose nitrate, polyethylene terephthalate,
polyethylene, polystyrene, polypropylene, polycarbonate, and
polyvinyl acetal), and paper or a plastic film, laminated with or
deposited with any of the above-described metals. Since the ink
composition of the invention has excellent adhesion, the ink
composition of the invention can be preferable used for an
unabsorbent recording medium as a recording medium, and among them,
a plastic base material such as polyvinyl chloride, polyethylene
terephthalate, or polyethylene is preferred, a polyvinyl chloride
resin base material is more preferred, and a polyvinyl chloride
resin sheet or film is even more preferred.
[0156] <Irradiation Process>
[0157] Hereinbelow, the irradiation process in the image forming
method of the invention is described. The irradiation process in
the invention is not particularly limited as long as it is a
process of irradiating the ink composition applied onto the
above-described recording medium with an active energy ray.
[0158] Examples of the active energy ray that may be used in the
irradiation process include an ultraviolet ray (hereinafter, may be
referred to as UV ray), visible light, and an electron beam, and UV
ray is preferably used.
[0159] The peak wavelength of the UV ray may vary depending on the
absorption characteristics of the sensitizing pigment that is used
as necessary, however, is preferably from 200 to 405 nm, more
preferably from 250 to 405 nm, and even more preferably from 250 to
390 nm, for example.
[0160] The output of the UV ray is preferably 2,000 mJ/cm.sup.2 or
less, more preferably from 10 mJ/cm.sup.2 to 2,000 mJ/cm.sup.2,
even more preferably from 20 mJ/cm.sup.2 to 1,000 mJ/cm.sup.2, and
particularly preferably from 50 mJ/cm.sup.2 to 800 mJ/cm.sup.2.
[0161] In addition, it is suitable that the UV ray is applied such
that the irradiation of the exposed surface is from 10 mW/cm.sup.2
to 2,000 mW/cm.sup.2, and preferably from 20 mW/cm.sup.2 to 1,000
mW/cm.sup.2, for example.
[0162] The UV ray source that is commonly used is a mercury lamp, a
gas/solid laser, and the like, and a mercury lamp and a metal
halide lamp are widely known. Substitution with a GaN semiconductor
ultraviolet emitting device is industrially and environmentally
very useful, and LEDs (UV-LEDs) and LDs (UV-LDs) are expected as UV
ray sources, because they have a compact size, a long life, a high
efficiency, and provide a low cost.
[0163] It is suitable that the ink composition of the invention is
irradiated with the UV ray for a period of, for example, from 0.01
seconds to 120 seconds, and preferably from 0.1 seconds to 90
seconds.
[0164] The irradiation conditions and basic irradiation method are
described in JP-A No. 60-132767. Specifically, a so-called shuttle
system of performing scanning with a head unit and a light source
which is installed at both sides of the head unit including the ink
jetting device and a system using a light source that is non-driven
are preferred. The irradiation of the active energy ray is carried
out after jetting and heat-fixing of ink, at an interval of a
certain period of time (for example, from 0.01 seconds to 60
seconds, preferably from 0.01 seconds to 30 seconds, and more
preferably from 0.01 seconds to 15 seconds).
EXAMPLES
[0165] Hereinafter, the present invention is more specifically
described with reference to examples, but the present invention is
not limited to these examples. Unless specifically otherwise noted,
"parts" are all based on "parts by mass."
Example 1
[0166] Components described below were stirred by a high-speed
water cooling type agitator to obtain a magenta color-ink
composition.
[0167] (Magenta Color-Ink Composition)
TABLE-US-00001 compound (11-14) ((component A), structure shown
below) 6.4 parts monofunctional acrylate ((component B1),
manufactured by 13 parts Sartomer, SR531, (cyclic trimethylol
propane formal acrylate)) monofunctional acrylate ((component B1),
manufactured by 34 parts Sartomer, SR339, (2-phenoxyethyl
acrylate)) N-vinyl caprolactam 15.0 parts ((component B1), V-CAP,
manufactured by ISP Japan) bifunctional acrylate ((component B2),
manufactured by 20.7 parts Sartomer, SR9045, (alkoxylated neopentyl
glycol diacrylate)) polyfunctional acrylate ((component B2),
manufactured by 1 part Sartomer, SR399, (dipentaerythritol
pentaacrylate)) RAPI-CURE DVE-3 ((component B2), vinyl ether
compound, 4 parts manufactured by ISP Europe)) SOLSPERSE 32000
(dispersant, manufactured by Noveon) 1.2 parts CINZUASIA MAZENTA
RT-355D 3.6 parts ((component C), pigment, manufactured by BASF
Japan) FIRSTCURE ST-1 (polymerization inhibitor, manufactured by
0.05 parts Chem First) DAROCUR ITX 1 part (sensitizing agent,
manufactured by BASF Japan) BYK 307 (antifoaming agent,
manufactured by BYK Chemie) 0.05 parts (11-14) ##STR00021##
[0168] (Evaluation of Ink Composition)
[0169] The obtained magenta color-ink composition was applied onto
polyvinyl chloride sheet (AVERY (R) 400, manufactured by Avery
Dennison Japan K.K.) as a recording medium using an inkjet
recording device (LUXEL JET UV350GTW, manufactured by Fujifilm
Corporation) having a piezo type inkjet head, at a quality mode
without using an UV lamp to form a solid image. After jetting the
ink composition, the composition was irradiated with light of a
low-pressure mercury lamp (UVO-CLEANER MODEL 42, manufactured by
JELIGHT COMPANY), thereby curing the ink and obtaining printed
matter.
[0170] Thereafter, the evaluation was made according to the
following criteria. The obtained evaluation results are shown in
the Table 1.
[0171] <Evaluation of Blocking Resistance>
[0172] An unprinted recording medium was prepared, and then the
recording medium to which the ink composition was applied and the
unprinted recording medium were superposed on each other. Breaking
of a film on the printed surface or presence or absence of transfer
to a base surface was evaluated at the time of peeling after a
certain period of time.
[0173] Further, as for the printed matter used for blocking test,
those exposed with light exposure energy of about 2,000 mJ/cm.sup.2
were used. Further, storing the printed matter was performed for 48
hours (stored in an incubator at 45.degree. C.) in a condition in
which even load (1.5 kg/cm.sup.2) of a weight was applied to entire
printed matter in which the printed surface and the base surface
was superposed on each other. After 48 hours, the printed surface
and the base surface were detached from each other, and evaluation
was made with the naked eye according to the following
criteria.
[0174] --Criteria--
[0175] 3: There was no film breaking or the like on the printed
surface and no ink transfer to the base surface.
[0176] 2: Film breaking or internal film rupture was observed in
part of the printed surface, or ink transfer was observed in part
of the base surface (here, the term "part" means an area of less
than 50% in the whole area)
[0177] 1: Film breaking or internal film rupture was observed all
over the printed surface, or ink transfer was observed all over the
base surface (here, the term "part" means an area of 50% or more in
the whole area)
[0178] <Jetting stability>
[0179] After the obtained ink composition was stored for 4 weeks at
45.degree. C. and for 1 week at -15.degree. C., recording on a
recording medium was performed using the inkjet recording device
having a piezo type inkjet nozzle. Presence or absence of dot
omission and ink scattering were observed with the naked eye after
continuous printing for 1 hour at room temperature, and average
value obtained by repeating the measurement for three times was
evaluated according to the following criteria. The results are
shown in the following Table 1. "A" and "B" are recognized as
practically admissible level and "C" and "D" are recognized as
practically problematic level.
[0180] --Criteria--
[0181] A: No occurrence of dot omission or ink scattering, or
occurrence in less than 1 region.
[0182] B: Occurrence of dot omission or ink scattering in 1 region
or more but less than 2 regions.
[0183] C: Occurrence of dot omission or ink scattering in 2 regions
or more but less than 6 regions.
[0184] D: Occurrence of dot omission or ink scattering in 6 or more
regions.
Example 2
[0185] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0186] (Yellow Color-Ink Composition)
TABLE-US-00002 polymer (1a-2') ((component A), structure shown
below) 5.9 parts monofunctional acrylate ((component B1), 22 parts
manufactured by Sartomer, SR531) monofunctional acrylate
((component B1), 41 parts manufactured by Sartomer, SR339)
monofunctional acrylate ((component B1), 21 parts manufactured by
Sartomer, SR489) polyfunctional acrylate ((component B2), 1.0 part
manufactured by Sartomer, SR399, (dipentaerythritol pentaacrylate))
RAPI-CURE DVE-3 4.0 parts ((component B2), vinyl ether compound,
manufactured by ISP Europe) SOLSPERSE 32000 (dispersant,
manufactured by Noveon) 0.4 parts CROMOPHTAL YELLOW LA 3.6 parts
((component C), pigment, manufactured by BASF Japan) FIRSTCURE ST-1
(polymerization inhibitor, 0.05 parts manufactured by Chem First)
DAROCUR ITX 1.0 part (sensitizing agent, manufactured by BASF
Japan) BYK 307 (antifoaming agent, manufactured by BYK Chemie) 0.05
parts (1a-2') ##STR00022## (weight average molecular weight:
18,000)
[0187] The obtained yellow color-ink composition of Example 2 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Example 3
[0188] Components described below were stirred by a high speed
water cooling type agitator to obtain a black color-ink
composition.
[0189] (Black Color-Ink Composition)
TABLE-US-00003 polymer (1a-2') (structure shown below) 6.3 parts
(weight average molecular weight: 18,000, structure shown below)
monofunctional acrylate ((component B1), 14 parts manufactured by
Sartomer, SR531) N-vinyl caprolactam 15.0 parts ((component B1),
V-CAP, manufactured by ISP Japan) monofunctional acrylate
((component B1), 39.0 parts manufactured by Sartomer, CD420)
polyfunctional acrylate ((component B2), 18.6 parts manufactured by
Sartomer, SR9045) polyfunctional acrylate ((component B2), 3 parts
manufactured by Sartomer, SR399) SOLSPERSE 32000 (dispersant,
manufactured by Noveon) 1.2 parts MICROLITH BLACK C-K 2.6 parts
((component C), pigment, manufactured by BASF Japan) FIRSTCURE ST-1
(polymerization inhibitor, 0.05 parts manufactured by Chem First)
DAROCUR ITX 0.2 parts (sensitizing agent, manufactured by BASF
Japan) BYK 307 (antifoaming agent, manufactured by BYK Chemie) 0.05
parts (1a-2') ##STR00023## (weight average molecular weight:
18,000)
[0190] The obtained black color-ink composition of Example 3 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Example 4
[0191] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0192] (Yellow Color-Ink Composition)
TABLE-US-00004 polymer (1a-2') 5.9 parts monofunctional acrylate
((component B1), manufactured 22 parts by Sartomer, SR531)
monofunctional acrylate ((component B1), manufactured 42 parts by
Sartomer, SR339) monofunctional acrylate ((component B1),
manufactured 21 parts by Sartomer, SR489) polyfunctional acrylate
((component B2), manufactured 1 part by Sartomer, SR399) RAPI-CURE
DVE-3 ((component B2), vinyl ether 4.0 parts compound, manufactured
by ISP Europe) SOLSPERSE 32000 (dispersant, manufactured by Noveon)
0.4 parts CROMOPHTAL Yellow LA ((component C), pigment, 3.6 parts
manufactured by BASF Japan) FIRSTCURE ST-1 (polymerization
inhibitor, manufactured 0.05 parts by Chem First) BYK 307
(antifoaming agent, manufactured by BYK 0.05 parts Chemie)
[0193] The obtained yellow color-ink composition of Example 4 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Example 5
[0194] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0195] (Yellow Color-Ink Composition)
TABLE-US-00005 polymer (1a-2') 2.0 parts monofunctional acrylate
((component B1), manufactured 26 parts by Sartomer, SR531)
monofunctional acrylate ((component B1), manufactured 42 parts by
Sartomer, SR339) monofunctional acrylate ((component B1),
manufactured 21 parts by Sartomer, SR489) polyfunctional acrylate
((component B2), manufactured 0.9 parts by Sartomer, SR399)
RAPI-CURE DVE-3 ((component B2), vinyl ether 4.0 parts compound,
manufactured by ISP Europe) SOLSPERSE 32000 (dispersant,
manufactured by Noveon) 0.4 parts CROMOPHTAL YELLOW LA ((component
C), pigment, 3.6 parts manufactured by BASF Japan) FIRSTCURE ST-1
(polymerization inhibitor, manufactured 0.05 parts by Chem First)
BYK 307 (antifoaming agent, manufactured by BYK 0.05 parts
Chemie)
[0196] The obtained yellow color-ink composition of Example 5 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Example 6
[0197] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0198] (Yellow Color-Ink Composition)
TABLE-US-00006 polymer (1a-2') 14.5 parts monofunctional acrylate
((component B1), manufactured 22 parts by Sartomer, SR531)
monofunctional acrylate ((component B1), manufactured 40 parts by
Sartomer, SR339) monofunctional acrylate ((component B1),
manufactured 19.4 parts by Sartomer, SR489) SOLSPERSE 32000
(dispersant, manufactured by Noveon) 0.4 parts CROMOPHTAL YELLOW LA
((component C), pigment, 3.6 parts manufactured by BASF Japan)
FIRSTCURE ST-1 (polymerization inhibitor, manufactured 0.05 parts
by Chem First) BYK 307 (antifoaming agent, manufactured by BYK 0.05
parts Chemie)
[0199] The obtained yellow color-ink composition of Example 6 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Example 7
[0200] Components described below were stirred by a high speed
water cooling type agitator to obtain a magenta color-ink
composition.
[0201] (Magenta Color-Ink Composition)
TABLE-US-00007 compound (11-9) ((component A), structure shown
below) 6.4 parts monofunctional acrylate ((component B1), 13.0
parts manufactured by Sartomer, SR531) monofunctional acrylate
((component B1), 34.0 parts manufactured by Sartomer, SR339)
N-vinyl caprolactam 15.0 parts ((component B1), V-CAP, manufactured
by ISP Japan) bifunctional acrylate ((component B2), manufactured
by 20.7 parts Sartomer, SR9045, (alkoxylated neopentyl glycol
diacrylate)) polyfunctional acrylate ((component B2), 1.0 part
manufactured by Sartomer, SR399, (dipentaerythritol pentaacrylate))
RAPI-CURE DVE-3 4.0 parts ((component B2), vinyl ether compound
manufactured by ISP Europe) SOLSPERSE 32000 (dispersant,
manufactured by Noveon) 1.2 parts CINQUASIA MAZENTA RT-355D 3.6
parts ((component C), pigment, manufactured by BASF Japan)
FIRSTCURE ST-1 (polymerization inhibitor, 0.05 parts manufactured
by Chem First) DAROCUR ITX 1.0 part (sensitizing agent,
manufactured by BASF Japan) BYK 307 (antifoaming agent,
manufactured by BYK Chemie) 0.05 parts (11-9) ##STR00024##
[0202] The obtained magenta color-ink composition of Example 7 was
jetted to a polyvinyl chloride sheet and cured, in the same manner
as in Example 1. Then, it was evaluated in the same manner as in
Example 1. The results are shown in the Table 1.
Comparative Example 1
[0203] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0204] (Yellow Color-Ink Composition)
TABLE-US-00008 Comparative compound 1 (homopolymer of butyl 5.9
parts methacrylate (structure shown below)) (weight average
molecular weight: 20,000) monofunctional acrylate ((component B1),
22.0 parts manufactured by Sartomer, SR531) monofunctional acrylate
((component B1), 41.0 parts manufactured by Sartomer, SR339)
monofunctional acrylate ((component B1), 21.0 parts manufactured by
Sartomer, CD420) polyfunctional acrylate ((component B2), 1.0 part
manufactured by Sartomer, SR399) RAPI-CURE DVE-3 4.0 parts
((component B2), vinyl ether compound, manufactured by ISP Europe)
SOLSPERSE 32000 (dispersant, manufactured by Noveon) 0.4 parts
CROMOPHTAL YELLOW LA 3.6 parts ((component C), pigment manufactured
by BASF Japan) FIRSTCURE ST-1 (polymerization inhibitor, 0.05 parts
manufactured by Chem First) DAROCUR ITX 1.0 part (sensitizing
agent, manufactured by BASF Japan) BYK 307 (antifoaming agent,
manufactured by BYK Chemie) 0.05 parts ##STR00025##
[0205] The obtained yellow color-ink composition of Comparative
example 1 was jetted to a polyvinyl chloride sheet and cured, in
the same manner as in Example 1. Then, it was evaluated in the same
manner as in Example 1. The results are shown in the Table 1.
Comparative Example 2
[0206] Components described below were stirred by a high speed
water cooling type agitator to obtain a yellow color-ink
composition.
[0207] (Yellow Color-Ink Composition)
TABLE-US-00009 mono functional acrylate ((component B1),
manufactured 22.0 parts by Sartomer, SR531) mono functional
acrylate ((component B1), manufactured 41.0 parts by Sartomer,
SR339) mono functional acrylate ((component B1), manufactured 21.0
parts by Sartomer, CD420) polyfunctional acrylate ((component B2),
manufactured 6.9 parts by Sartomer, SR399) RAPI-CURE DVE-3
((component B2), vinyl ether 4.0 parts compound, manufactured by
ISP Europe) SOLSPERSE 32000 (dispersant, manufactured by Noveon)
0.4 parts CROMOPHTAL YELLOW LA 3.6 parts ((component C), pigment,
manufactured by BASF Japan) FIRSTCURE ST-1 (polymerization
inhibitor, manufactured 0.05 parts by Chem First) DAROCUR ITX
(sensitizing agent, manufactured by BASF 1.0 part Japan) BYK 307
(antifoaming agent, manufactured by BYK 0.05 parts Chemie)
[0208] The obtained yellow color-ink composition was jetted to a
polyvinyl chloride sheet and cured, in the same manner as in
Example 1. Then, it was evaluated in the same manner as in Example
1. The results are shown in the Table 1.
Comparative Example 3
TABLE-US-00010 [0209] 1,6-bismaleimide hexane (Comparative Compound
2, 6.5 parts manufactured by Tokyo Chemical Industry Co., Ltd.,
structure shown below) monofunctional acrylate ((component B1),
10.5 parts manufactured by Sartomer, SR531, (cyclic trimethylol
propane formal acrylate)) monofunctional acrylate ((component B1),
36.5 parts manufactured by Sartomer, SR339, (2-phenoxyethyl
acrylate)) monofunctional acrylate ((component B1), 23.7 parts
manufactured by Sartomer, SR506, (isobornyl acrylate)) bifunctional
acrylate ((component B2), 4.0 parts manufactured by Sartomer,
SR508, (dipropylene glycol diacrylate)) N-vinyl caprolactam 14.0
parts ((component B1), V-CAP, manufactured by ISP Japan) SOLSPERSE
32000 (dispersant, manufactured by Noveon) 1.2 parts IRGALITE BLUE
GLVO 3.0 parts ((component C), pigment, manufactured by BASF Japan)
FIRSTCURE ST-1 (polymerization inhibitor, 0.05 parts manufactured
by Chem First) DAROCUR ITX 0.5 parts (sensitizing agent,
manufactured by BASF Japan) BYK 307 (antifoammg agent manufactured
by BYK Chemie) 0.05 parts ##STR00026##
[0210] The obtained blue color-ink composition was jetted to a
polyvinyl chloride sheet and cured, in the same manner as in
Example 1. Then, it was evaluated in the same manner as in Example
1. The results are shown in the Table 1.
TABLE-US-00011 TABLE 1 Table 1 Example 1 Example 2 Example 3
Component A Compound (11-14) 6.4 -- -- Compound (11-9) -- -- --
Polymer (1a-2') -- 5.9 6.3 Comparative Comparative Compound 1 -- --
-- Compound Homopolymer of butyl methacrylate Comparative Compound
2 -- -- -- 1,6-bismaleimide hexane manufactured by Tokyo Chemical
Industry Co., Ltd. Content of component A in ink 6.4 5.9 6.3
composition Component B1 SR531 13 22 14 manufactured by Sartomer
SR339 34 41 -- manufactured by Sartomer SR506 -- -- -- manufactured
by Sartomer SR489 -- 21 -- manufactured by Sartomer N-Vinyl
caprolactam 15 -- 15 manufactured by ISP Japan CD420 -- -- 39
manufactured by Sartomer Component B2 SR508 -- -- -- manufactured
by Sartomer SR9045 20.7 -- 18.6 manufactured by Sartomer SR399 1 1
3 manufactured by Sartomer Rapi-cure DVE-3 4 4 -- Vinyl ether
compound, manufactured by ISP Europe Content of component B1 and
87.7 89 89.6 component B2 in ink composition Pigment Irgalite Blue
GLVO -- -- -- manufactured by BASF Japan Cinzuasia Mazenta RT-355D
3.6 -- -- manufactured by BASF Japan Cromophtal Yellow LA -- 3.6 --
manufactured by BASF Japan Microlith Black C-K -- -- 2.6 Dispersant
Solsperse 32000 1.2 0.4 1.2 manufactured by Noveon Polymerization
Firstcure ST-1 0.05 0.05 0.05 inhibitor manufactured by Chem First
Sensitizing agent Darocur ITX 1 1 0.2 manufactured by BASF Japan
Antifoaming agent Byk 307 0.05 0.05 0.05 manufactured by BYK Chemie
Evaluation Blocking resistance 3 3 3 Jetting stability A A A Table
1 Example 4 Example 5 Example 6 Example 7 Component A Compound
(11-14) -- -- -- -- Compound (11-9) -- -- -- 6.4 Polymer (1a-2')
5.9 2.0 14.5 -- Comparative Comparative Compound 1 -- -- -- --
Compound Homopolymer of butyl methacrylate Comparative Compound 2
-- -- -- -- 1,6-bismaleimide hexane manufactured by Tokyo Chemical
Industry Co., Ltd. Content of component A in ink 5.9 2 14.5 6.4
composition Component B1 SR531 22 26 22 13 manufactured by Sartomer
SR339 42 42 40 34 manufactured by Sartomer SR506 -- -- -- --
manufactured by Sartomer SR489 21 21 19.4 -- manufactured by
Sartomer N-Vinyl caprolactam -- -- -- 15 manufactured by ISP Japan
CD420 -- -- -- -- manufactured by Sartomer Component B2 SR508 -- --
-- -- manufactured by Sartomer SR9045 -- -- -- 20.7 manufactured by
Sartomer SR399 1 0.9 -- 1 manufactured by Sartomer Rapi-cure DVE-3
4 4 -- 4 Vinyl ether compound, manufactured by ISP Europe Content
of component B1 and 90 93.9 81.4 87.7 component B2 in ink
composition Pigment Irgalite Blue GLVO -- -- -- -- manufactured by
BASF Japan Cinzuasia Mazenta RT-355D -- -- -- 3.6 manufactured by
BASF Japan Cromophtal Yellow LA 3.6 3.6 3.6 -- manufactured by BASF
Japan Microlith Black C-K -- -- -- Dispersant Solsperse 32000 0.4
0.4 0.4 1.2 manufactured by Noveon Polymerization Firstcure ST-1
0.05 0.05 0.05 0.05 inhibitor manufactured by Chem First
Sensitizing agent Darocur ITX -- -- -- 1 manufactured by BASF Japan
Antifoaming agent Byk 307 0.05 0.05 0.05 0.05 manufactured by BYK
Chemie Evaluation Blocking resistance 2 2 3 2 Jetting stability A A
B B Comparative Comparative Comparative Table 1 Example 1 Example 2
Example 3 Component A Compound (11-14) -- -- -- Compound (11-9) --
-- -- Polymer (1a-2') -- -- -- Comparative Comparative Compound 1
5.9 -- -- Compound Homopolymer of butyl methacrylate Comparative
Compound 2 -- -- 6.5 1,6-bismaleimide hexane manufactured by Tokyo
Chemical Industry Co., Ltd. Content of component A in ink 5.9 0 6.5
composition Component B1 SR531 22 22 10.5 manufactured by Sartomer
SR339 41 41 36.5 manufactured by Sartomer SR506 -- -- 23.7
manufactured by Sartomer SR489 -- -- -- manufactured by Sartomer
N-Vinyl caprolactam -- -- 14 manufactured by ISP Japan CD420 21 21
-- manufactured by Sartomer Component B2 SR508 -- -- 4 manufactured
by Sartomer SR9045 -- -- -- manufactured by Sartomer SR399 1 6.9 --
manufactured by Sartomer Rapi-cure DVE-3 4 4 -- Vinyl ether
compound, manufactured by ISP Europe Content of component B1 and 89
94.9 88.7 component B2 in ink composition Pigment Irgalite Blue
GLVO -- -- 3 manufactured by BASF Japan Cinzuasia Mazenta RT-355D
-- -- -- manufactured by BASF Japan Cromophtal Yellow LA 3.6 3.6 --
manufactured by BASF Japan Microlith Black C-K -- -- -- Dispersant
Solsperse 32000 0.4 0.4 1.2 manufactured by Noveon Polymerization
Firstcure ST-1 0.05 0.05 0.05 inhibitor manufactured by Chem First
Sensitizing agent Darocur ITX 1 1 0.5 manufactured by BASF Japan
Antifoaming Byk 307 0.05 0.05 0.05 agent manufactured by BYK Chemie
Evaluation Blocking resistance 1 1 2 Jetting stability C A C * In
the Table, the symbol "--" means that it is not included. * In the
Table, numbers are based on parts by mass.
[0211] Disclosure of Japanese Patent Application No. 2011-068835 is
entirely incorporated by reference in the present
specification.
[0212] All publications, patent applications, and technical
standards mentioned in this specification are herein incorporated
by reference to the same extent as if each individual publication,
patent application, or technical standard was specifically and
individually indicated to be incorporated by reference.
* * * * *